Emergency — phone the vet now
Immediate
Dog trapped in a hot car
Dogs die in hot cars within minutes — call 999 (police) immediately if the dog appears in distress; legal protection exists for breaking windows in genuine emergencies.
Recognise the signs
- Heavy panting, drooling
- Distress, vocalisation
- Bright red gums
- Wobbliness, collapse
- Unresponsiveness — already critical
First aid steps
- Call 999 (police) — they have a duty to attend, and can authorise window-breaking.
- Note car registration and exact location.
- Try to find the owner via shop announcements.
- If the dog is unresponsive and police cannot attend in time, breaking the window may be defensible — call 999 first to log the situation. The Criminal Damage Act 1971 provides a defence where action is taken to prevent suffering.
- Once out, follow heat stroke first aid (see dog-heat-stroke).
Do NOT
- Do not delay calling 999.
- Do not leave the scene.
- Do not assume the owner will return in time.
While transporting to the vet
- Cool the dog as in dog-heat-stroke.
When to phone the vet immediately
- Any unresponsive or collapsed dog in a car is an immediate emergency.
Common causes
- Owners 'just popping in' to a shop
- Underestimating heat on cloudy or mild days
- Cars heat to lethal temperatures within 10–15 minutes even on 22°C days
What the vet will need to know
- Approximate time in car
- Outside temperature
- Dog's condition on rescue
Aftercare
- See dog-heat-stroke for treatment.
- Even apparently fine dogs need vet checks — DIC and kidney damage can develop later.
Prevention
- Never leave a dog in a parked car, even briefly, even with windows cracked.
- Brief friends and family — accidents happen with non-owners.
- Plan errands without the dog in summer.
Breed-specific notes
- Brachycephalic breeds at higher risk in lower temperatures.
Frequently asked questions
Can I legally break the window?
The Criminal Damage Act 1971 provides a defence where you act to prevent suffering. Always call 999 first to log the situation. Police can authorise action and attend where possible.
How quickly do cars get dangerous?
On a 22°C day, a parked car can reach 47°C within an hour. On a 30°C day, it's lethal within 10–15 minutes.
What if the windows are cracked?
Makes negligible difference. Cars still heat to lethal temperatures rapidly with cracked windows.